This is a CGI images of my biological sci-fi idea.
The colony is formed by guard cells. The guard cells were originally part of stomata of plants. Within 1-2 hundred million years ago, the cells were separated from tissues and evolve to form colony.
The each guards have two translucent compartments. They keep luminescent microorganisms in the room.
The light emitted from the compartments basically gives energy for a colony of guard cells. But colonies uses the light as signal to communicate or alarm to enemy.
Making the object:
Then I applied array modifier to the cell to make colony.